print(""""
\nFirstly,you need to name the feature.Then you can do some arithmetic operation on the new feature.\n~~~\nSelected data set:\na - SIO2(WT%)\nb - TIO2(WT%)\nc - AL2O3(WT%)\nd - CR2O3(WT%)\ne - FEOT(WT%)\nf - CAO(WT%)\nName the constructed feature (column name):\n

"""
)